JPH0596686U - Pipe connection device - Google Patents

Abstract

(57) [Summary] (Correction) [Purpose] To provide a pipe connecting device which has no fluid pool, uses a small amount of material, is advantageous in cost, and can improve productivity. A connecting body 26 for connecting a tube body 22 is provided on a main body 20, a male screw portion 28 is formed in this, an insertion hole 30 is formed, and a connecting body side taper surface 32 that expands toward this tip side is formed. A tightening body side tapered surface 38 facing the connection body side tapered surface is formed on the tightening body externally fitted to the pipe body, a seal body 36 externally fitted to the pipe body is provided, and a female screw hole 40 is formed on the main body. A mounting hole 42 is formed on the inner rear side of the female screw hole, and a pressing surface 44 on which the seal body is pressed is formed on the inner rear side of the female screw hole.
A fitting insertion hole 48 is formed to be fitted and inserted on the free end side of the tubular body, and the contact surface 5 on which the free end side end surface 50 of the tubular body abuts is formed on the inner back side thereof.
2 is formed and provided, and a main body side flow hole 56 having the same diameter as the pipe side flow hole 54 of the pipe body is provided.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a pipe connecting device, and more particularly to a pipe connecting device that can eliminate the inconvenience that a fluid remains, can be made cost-effective, and can improve productivity.

[0002]

[Prior Art]

 In analyzers, medicinal chemistry devices, biotechnology environmental devices, etc., pipes through which fluids flow are installed. Some of the fluids flowing through this pipe contain harmful substances. For this reason, a pipe connecting device having a structure for preventing leakage of fluid is used at a connecting portion between a main body of equipment constituting the device and the pipe.

As a conventional pipe connecting device, there is one shown in FIGS. 8 and 9, for example. In FIG. 8, reference numeral 102 is a solenoid valve constituting a device such as an analyzer (not shown), 104 is a casing, 106 is a solenoid coil, 108 is a core, 110 is a plunger, 112 is a spring, 114 is a valve. A body, 116 is a valve hole, and 118 is a main body. The pipe body connecting device 122 that connects the pipe body 120 to the main body 118 of the electromagnetic valve 102 that is a device is provided with the connection body 124. A male screw portion 126 is formed on the connection body 124, and the free end 128 side of the pipe body 120 is connected to the connection body 124.

On the other hand, the main body 118 is provided with a female screw hole 130 into which the male screw portion 126 is screwed, and the main body that is communicated with the tubular body side circulation hole 132 of the tubular body 120 at the inner back side of the female screw hole 130. The side circulation hole 134 is formed and provided. The main body side flow hole 134 communicates with a valve hole 116 which is opened and closed by a valve body 114 attached to the plunger 110.

The pipe body connecting device 122 connects the pipe body 120 to the main body 118 by screwing the male screw part 126 of the connecting body 124 to which the pipe body 120 is coupled into the female screw hole 130 of the main body 118 and tightening. It is a thing.

In FIG. 9, 202 is a solenoid valve, 204 is a casing, 206 is a solenoid coil, 208 is a core, 210 is a plunger, 212 is a spring, 214 is a valve body, 216 is a valve hole, and 218 is a main body. .. The pipe body connecting device 222 for connecting the pipe body 220 to the main body 218 of the electromagnetic valve 202, which is a device, is provided with the connection body 224. A female screw hole 226 is formed in the connection body 224, and an insertion hole 230 is formed on the free end 228 side of the tubular body 220. Further, a tightening body 232 that is fitted onto the pipe body 220 is provided.

On the other hand, the main body 218 is provided with a male screw portion 234 into which the female screw hole 226 is screwed and formed so as to project, and the male screw portion 234 is fitted and inserted on the free end 228 side of the tubular body 220. A hole 236 is formed and provided, and a main body side circulation hole 240 communicating with the pipe side circulation hole 238 of the pipe body 220 is formed inside the fitting insertion hole 236. The main body side flow hole 240 communicates with a valve hole 216 which is opened and closed by a valve body 214 attached to the plunger 210.

In this pipe body connecting device 222, a fastening body 232 is externally fitted to the pipe body 220, the free end 228 side is fitted into a fitting insertion hole 236 of the main body 218, and the female screw hole 226 of the connection body 222 is machined. The tubular body 220 is connected to the main body 218 by screwing it into the male screw portion 234 of the body 218 for tightening and pressing and deforming the tightening body 232 between the male screw portion 234 and the connecting body 222.

[0009]

[Problems to be solved by the device]

 However, in the pipe body connecting device 122 shown in FIG. 8, since the main body 118 and the pipe body 120 are connected to each other via the connecting body 124, there is a disadvantage that a liquid-tight connection is difficult and the main body is connected. Since the fluid reservoir 136 is formed between the female screw hole 130 of 118 and the male screw portion 126 of the connection body 124, there is a disadvantage that the fluid remains.

Further, in the pipe body connecting device 222 shown in FIG. 9, since the tightening body 232 is pressed and deformed between the male screw part 234 and the connecting body 222, the seal is insufficient and leakage occurs. Since the male screw portion 234 is formed so as to project from the main body 218, many materials can be used especially when an expensive material with high chemical resistance is used for the main body 218, such as equipment in which chemicals are distributed. However, since there is a disadvantage in terms of cost, there is a disadvantage in that productivity is poor due to a large number of processing man-hours.

[0011]

[Means for Solving the Problems]

 Therefore, in order to eliminate the above-mentioned inconvenience, the present invention provides a connection body for connecting a pipe body to the main body, and a male screw portion is formed on the connection body and an insertion hole through which the pipe body is inserted. The connecting body side taper surface is formed so as to expand toward the tip side of the insertion hole, and the tightening body side that is fitted to the pipe body faces the connecting body side taper surface. A taper surface is formed, a seal body is fitted to the pipe body, a female screw hole is formed in the main body to which the male screw portion is screwed, and the inner rear side of the female screw hole is formed. Is provided with a mounting hole into which the seal body and the tightening body are mounted, and a pressing surface against which the seal body is pressed is formed inside the mounting hole and the free end of the tube body is provided. Side is formed by forming a fitting insertion hole, and the above-mentioned Body, characterized in that a said tube of the tube-side circulation hole and the body-side circulation hole of the same diameter to together be provided by forming an abutment surface which abuts the free end side end face of the.

[0012]

[Action]

 According to the structure of the present invention, the body is provided with the contact surface against which the end surface on the free end side of the tubular body abuts, on the inner rear side of the insertion hole, so that the fluid pool is formed. There is nothing. Also, unlike the conventional case where the male screw portion is not formed by projecting as in the conventional case, the female screw hole into which the male screw portion of the connection body is screwed is formed and the material used is reduced. It is possible to reduce the man-hours required for processing.

[0013]

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

1 to 7 show an embodiment of the present invention. In FIGS. 1 and 2, 2 is a solenoid valve constituting a device such as an analyzer (not shown), 4 is a casing, 6 is a solenoid coil, 8 is a core, 10 is a plunger, 12 is a spring, and 14 is a valve body. 16 is a valve hole, 18 is an outflow hole, and 20 is a main body. The solenoid valve 2 is provided with pipe body connecting devices 24, 24 for connecting the pipe bodies 22, 22 shown in FIG. 3 to the valve hole 16 and the outflow hole 18, respectively.

The pipe body connecting devices 24 and 24 for connecting the pipe bodies 22 and 22 to the valve hole 16 and the outflow hole 18, respectively, have the same structure as shown in FIG. Therefore, in the following embodiments, a pipe connecting device 24 for connecting the pipe 22 to the valve hole 16 will be described.

The pipe connecting device 24 is provided with a connecting body 26 shown in FIG. A male screw portion 28 is formed and provided in the connecting body 26, and an insertion hole 30 through which the tube body 22 is inserted is formed in the same axis center. Further, the connecting body 26 is provided with a connecting body side taper surface 32 which is expanded toward the tip side of the insertion hole 30.

Further, the pipe body connecting device 24 is provided with an annular tightening body 34 and a seal body 36 which are fitted onto the pipe body 22. As shown in FIG. 5, the tightening body 34 has a trapezoidal cross section, and connects the tube body 22 to the main body 20 by pressing and deforming the tightening body side tapered surface 38 facing the connection body side tapered surface 32. It is formed and provided. The seal body 36 is an O-ring, has a circular cross section as shown in FIG. 6, and seals between the main body 20 and the pipe body 22.

As shown in FIG. 7, the main body 20 is provided with a female screw hole 40 into which the male screw portion 28 of the connector 26 is screwed. A mounting hole 42 into which the seal body 36 and the tightening body 34 are mounted is formed coaxially on the inner depth side of the female screw hole 40 of the main body 20.

A pressing surface 44 for pressing the seal body 36 is formed on the inner side of the mounting hole 42 of the main body 20, and a fitting insertion hole is formed on the free end 46 side of the tube body 22. No. 48 is formed coaxially.

Further, an abutting surface 52 with which the free end side end surface 50 of the tubular body 22 abuts is formed and provided inside the fitting insertion hole 48 of the main body 20, and the tubular body side of the tubular body 22 is provided. A main body side circulation hole 56 having the same diameter as the circulation hole 54 is formed coaxially. The main body side flow hole 56 communicates with the valve hole 16 that is opened and closed by the valve body 14 attached to the plunger 10.

Next, the operation will be described.

When connecting the pipe body 22 to the main body 20 of the solenoid valve 2, the free end 46 side of the pipe body 22 is inserted through the insertion hole 30 of the connection body 26 of the pipe body connecting device 24. The fastening body 34 is externally fitted to the pipe body 22 and the seal body 36 is fitted to the pipe body 22 so that the fastening body side tapered surface 38 faces the connection body side taper surface 32.

The tube body 22 having the connection body 26, the tightening body 34, and the seal body 36 fitted therein is fitted into the fitting hole 48 of the main body 20 on the free end 46 side. At this time, in the tube body 22, the free end side end surface 50 is brought into contact with the contact surface 52 on the inner side of the fitting insertion hole 48, and the tightening body 34 and the seal body 36 are mounted in the mounting hole 42. The seal body 36 is brought into contact with the pressing surface 44 on the inner side of the mounting hole 42.

From this state, when the male screw portion 28 of the connection body 26 is screwed into the female screw hole 40 of the main body 20 and tightened, the tightening body 34 and the seal body are provided between the pressing surface 44 and the connection body side tapered surface 32. A pressing force is applied to 36.

At this time, the tightening body 34 is deformed in the radial direction by the pressing force from the connecting body side tapered surface 32 via the tightening body side tapered surface 38, and at the same time, the pressing surface via the seal body 36. It is deformed in the radial direction by the pressing force from 44, and the tube body 22 is clamped and fixed to the main body 20. Further, the seal body 36 is deformed in the radial inward and outward directions by the pressing force from the connecting body side tapered surface 32 and the pressing force from the pressing surface 44 via the tightening body 34, so that the main body 20 and the pipe body 22 are separated from each other. Seal the space.

As a result, the pipe body 22 is connected to the main body 20, and the pipe body side circulation hole 54 is communicated with the main body side communication hole 56. The connected pipe body 22 is firmly clamped and fixed to the main body 20 by the clamp body 34, and the fluid does not leak due to the seal body 36.

As described above, the pipe connecting device 24 is provided by forming the contact surface 52 with which the free end side end surface 50 of the pipe 22 abuts on the inner rear side of the fitting insertion hole 48 of the main body 20. As a result, no fluid pool is formed. The main body 20 is used by forming a female screw hole 40 into which the male screw portion 28 of the connector 26 is screwed, instead of forming the male screw portion by protruding as in the conventional case. The material can be reduced and the processing man-hour can be reduced.

Therefore, since the fluid pool is not formed, it is possible to prevent the fluid from remaining. Further, since the amount of material used can be reduced, the cost can be favorably implemented, and the number of processing steps can be reduced, so that the productivity can be improved.

Although the tightening body 34 and the sealing body 36 are provided as separate parts in this embodiment, they can be provided integrally. By thus forming the tightening body 34 and the seal body 36 as one integrated component, the number of components can be reduced and the cost can be further improved.

Further, since the pipe body connecting device 24 for connecting the pipe body 22 to the outflow hole 18 has the same configuration as the pipe body connecting device 24 for connecting the pipe body 22 to the valve hole 16, the same structure is used. It is possible to exert the effect of action.

[0031]

[Effect of the device]

 As described above, according to the present invention, it is possible to prevent the fluid from remaining without forming a fluid pool, to reduce the amount of material used, and to carry out the processing cost effectively. It is possible to reduce man-hours and improve productivity.

[Brief description of drawings]

FIG. 1 is a half sectional view of an electromagnetic valve provided with a pipe connecting device showing an embodiment of the present invention.

FIG. 2 is a cutaway view of a main body in which pipes are connected by a pipe connecting device.

FIG. 3 is a sectional view of a tubular body.

FIG. 4 is a sectional view of a connection body.

FIG. 5 is a cross-sectional view of a tightening body.

FIG. 6 is a cross-sectional view of a seal body.

FIG. 7 is a cross-sectional view of the main body.

FIG. 8 is a half cross-sectional view of a solenoid valve provided with a pipe connecting device showing a conventional example.

FIG. 9 is a half cross-sectional view of an electromagnetic valve provided with a pipe connection device showing another conventional example.

[Explanation of symbols]

 2 Solenoid valve 6 Solenoid coil 10 Plunger 14 Valve body 16 Valve hole 18 Outflow hole 20 Main body 22 Tubular body 24 Tubular connection device 26 Connection body 28 Male screw part 30 Insertion hole 32 Connection body side taper surface 34 Tightening body 36 Sealing body 38 Tightening Attached body side taper surface 40 Female thread hole 42 Mounting hole 44 Pressing surface 46 Free end 48 Fitting insertion hole 50 Free end side end surface 52 Abutment surface 54 Tube side distribution hole 56 Body side distribution hole

─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] July 14, 1992

[Procedure Amendment 1]

[Document name to be corrected] Drawing

[Correction target item name] All drawings

[Correction method] Change

[Correction content]

[Figure 1]

[Fig. 2]

[Figure 3]

[Figure 4]

[Figure 5]

[Figure 6]

[Figure 7]

[Figure 8]

[Figure 9]

Claims (1)

[Scope of utility model registration request] 1. A main body is provided with a connecting body for connecting a tubular body, a male screw portion is formed in the connecting body, and an insertion hole through which the tubular body is inserted is formed. A tip of the through hole is provided. A tapered body on the side of the connecting body that is widened toward the side, and a tapered surface on the side of the fastening body that faces the tapered surface on the side of the connecting body is formed on the tightening body that is externally fitted to the tubular body. A sealing body to be externally fitted to the main body, a female screw hole into which the male screw portion is screwed is formed in the main body, and the sealing body and the tightening body are mounted on the inner side of the female screw hole. A hole is formed, and a pressing surface for pressing the seal body is formed on the inner side of the mounting hole, and a fitting insertion hole is formed on the free end side of the tube body. A contact surface is formed on the inner side of the fitting insertion hole, which is in contact with the free end side end surface of the tubular body. And a main body side circulation hole having the same diameter as the pipe side circulation hole of the pipe body.